VI46 L GBB
VI46 S GBB
VIPER TECH M16A3 RAS GBB
M4 CQB AAC TYPE GBB | M4 CQB AAC版 GBB
VIPER TECH MK-18 MOD 0 GBB
VIPER TECH M4A1 RAS GBB
SR-15 Lower Receiver | SR-15 下槍身
MK-18 Lower Receiver (Sea Anchor) | MK-18 下槍身 (海錨刻字)
XM177 E2 Lower Receiver | XM177 E2 下槍身
XM177 Lower Receiver (CAMMANDO) | XM177 下槍身(CAMMANDO)
A1 Type Lower Receiver | A1 下槍身
M4 Type Lower Receiver | M4下槍身